Richard goll



(No Model.)

Heem..

v DEVICE FR ADMITTING AIR T0 PURNGES. No. 604,385.

Patented May 24, 1898.

A MJ L A e.

Ihr/enfer Raimi Gazz NirnD STATES FFICE.

DEVICE FOR ADlV-IITTING AIR TO FURNACES.

SPECIFICATION forming part of Letters Patent No. 604,385, dated May 24,1898.

Application filed December 29, 1897. Serial No. 664,358. (No modeh)Patented in Switzerland November 29, 1896,No.17,136; in Hungary December2, 1896, No. 17,628; in Germany Deeember'24-l 1896, No. 94,822, and inFrance April 3, 1897, No.

To all whom t may concern:

Be it known that I, RICHARD GOLL, manufacturer, residing atFrankfort-on-the-Main, in the Kingdom of Prussia, German Empire, haveinvented new and useful Improvements in Regulable Admission Devices forAir to Furnaces and the Like, (patented in Germany, No. 94,822, December24, 1896; Austria, applied for December 1, 1897; in Hungary, No.

17,628, December 2, 1896; in Switzerland, No.`

17,136, November 29, 1896; Italy, No. 751, applied for December 1,`1897, and inV France, No. 265,637, April 3, 1897,) of which thefollowing is a specilication.

My invention consists in means t0 produce an equal draft under thegrates of furnaces as far as the admission of the air from outside underthe grate is concerned. I obtain hereby a very exact regulation betweenfull admission and entire exclusion of air.

In the accompanying drawings I have shown the way in which I propose tocarry out my invention.

Figure 1 is a front view of an ash-pit door with my improvement. Fig. 2is a section on line 2 2 of Fig. 1, admission open. vFigf is the samesection, admission closed. Figs. 4 and 5 are View and section of amodified form of an ash-pit door. Y

B is a plate hinged at b to the front plate of the ash-box.

A is a plate parallel to plate B and movable form is foundspeciallyadvantageous, as it obviates danger of the plates failing toregister nicely and gives a very delicate control of the admission ofair. The plate A shows perforations p opposite the bosses of plate B.

By turning the screw S by the handle R the openings p and q are openedor closed for the passage of air. In the intermediate positions thequantity of air is determined by the width of the annular passagebetween the edges of the openings p and the conoidical bosses r.

T is a packing-sheet, of asbestos or suitable material, with holescorresponding to those of plate B.

' In the modification shown in Figs.` 4 and 5 the plate A is hinged tothe plate Band the angular position controlled by a hand-lever H. Theheight of the bossesr1 r3 r2 r is decreasing here toward thehingeproportional to the distance therefrom. Y

Now what I claim, and desire to secure by Letters Patent, is thefollowing:

1. In a device for regulating-the admission of air and the like, thecombination of two perforated plates, one of which plates is movabletoward and from the other plate, a boss projecting from the surface ofone plate, placed opposite the opening in the other plate, anddecreasing in thickness toward the opening.

2. In a device for regulating admission of air and the'like, thecombination of two plates having series of openings, and bosses on oneplate opposite openin gs in the other plate, said bosses projecting fromthe normal surface of their plate.

8. The combination of two plates one having openings,`and bossesprojecting from the surface of the plate, the other plate beingperforated opposite the bosses, one plate being movable toward and fromthe other plate.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

RICHARD' GoLL.

Witnesses:

DEAN B. MASON, FRANK Il. MASON.

